Question 7. The following true stress-strain curve for a carbon nanofiber/epoxy with CaCO3 nanoparticles embedded in the matrix is represented in the figure bellow. Calculate the followings: a) K and n of stress-strain equation o=K ɛ". b) modulus of elasticity. c) toughness. 700 600 500 400 300 200 100 0.5 1 1.5 2 2.5 3 3.5 4 Strain % Stress (MPa)

Question 7. The following true stress-strain curve for a carbon nanofiber/epoxy with CaCO3 nanoparticles embedded in the matrix is represented in the figure bellow. Calculate the followings: a) K and n of stress-strain equation o=K ɛ". b) modulus of elasticity. c) toughness. 700 600 500 400 300 200 100 0.5 1 1.5 2 2.5 3 3.5 4 Strain % Stress (MPa)